Basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool ... . /Manganese and related compounds/
Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious or in severe respiratory distress. Monitor cardiac rhythm and treat arrhythmias if necessary ... . Start an IV with D5W /SRP: "To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. Consider drug therapy for pulmonary edema ... . For hypotension with signs of hypovolemia, administer fluid cautiously. Consider vasopressors for hypotension with a normal fluid volume. Watch for signs of fluid overload ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Manganese and related compounds/
Twenty-four crossbred Florida native wether lambs, 28 kg initially, were assigned randomly to a basal diet (31 ppm Mn dry matter basis) supplemented with either 0, 500, 1,000, 2,000 or 4,000 ppm Mn from feed grade MnO or 2,000, 4,000 or 8,000 ppm Mn from reagent grade MnCO3. There were three sheep/treatment, with ad libitum access to feed & tap water. After 84 d, all animals were slaughtered & tissues removed for analysis. Dietary Mn at the highest levels from either source reduced (P<0.05) average daily feed intake & average daily gain. Hemoglobin & hematocrit were not affected by dietary Mn. Manganese concn in kidney, spleen, heart, skeletal muscle, bone, serum (P<0.01) & liver (P<0.05) increased as dietary Mn increased. Kidney P was reduced (P<0.05) as dietary Mn increased; however, no other tissue minerals were affected. At comparable levels of supplementation, sheep fed feed-grade MnO exhibited numerically greater tissue Mn concentration than did those fed reagent-grade MnCO3 & regression analysis indicated higher rates of tissue uptake in MnO-supplemented sheep. Reduced feed intake & gain & apparent Mn homeostatic failure in liver were the only observed effects that may have been related to Mn toxicosis.
The subcellular distribution of manganese (Mn) in brains of mice chronically admin Mn in different chemical forms with food was examined using gel chromatography. Male ddY-mice were divided into five groups of six animals each, & Groups 1 to 4 were given 2 grams/kilogram Mn of standard laboratory mouse chow) in the form of manganese chloride (MnCl2), manganese acetate (MnAc), manganese carbonate (MnCO3), or manganese oxide (MnO2), in the diets for 12 months, while Group 5 served as control. 24 hr after the last feed, animals were decapitated & brains were rapidly removed for study of the different regions (corpus striatum (CS), hypothalamus, midbrain, cerebral cortex (CC), hippocampus, cerebellum, & medulla oblongata). Subcellular fractions (mitochondrial, microsomal & cytosolic) & gel chromatography fractions were analyzed for Mn contents using flame atomizer absorption spectrophotometry. Results showed that CC levels of Mn in mice exposed to the nearly insoluble MnCO3 & MnO2 were higher than in controls, while Mn concns in the CS were similar to those in controls. Microsomal Mn in treated mice was also higher than in controls. The gel chromatographic profile of CS showed that 20% Mn was in the high molecular weight (MW) fractions, 45% was in the middle MW fractions, while 32% was in the low MW fractions. The % Mn in high MW fractions was higher (29% to 49%) in the Mn treated groups, than in controls. The % of Mn in low MW fractions of the MnO2 exposed group (9%) was lower than in the MnCl2, MnAc, & MnCO3 exposed groups (42%, 36%, & 38%, respectively). The authors conclude that the brain regional distribution of Mn from the virtually insoluble cmpds is different from that of soluble Mn cmpds, & that striatal subcellular & gel chromatographic profiles are similar for the divalent Mn cmpds. They add that there is more Mn associated with fast migrating ligands in the striatal cytosol of the Mn treated groups than in the controls, & that these binding characteristics are different from those of other organs.
Cation Distribution and Local Configuration of Fe2+ Ions in Structurally Nonequivalent Lattice Sites of Heterometallic Fe(II)/M(II) (M = Mn, Co, Ni, Cu, Zn) Diaquadiformato Complexes
作者:M. Devillers、J. Ladrière
DOI:10.1006/jssc.1993.1092
日期:1993.3
57Fe Mössbauer investigations are carried out on a wide series of heterometallic diaquadiformato Fe(II)/M(II) complexes with M = Mn, Co, Ni, Cu, and Zn to provide a local picture of the coordination environment of the 57Fe2+ ions as a function of (i) the nature of the host cation and (ii) the relative amounts of both metals in the matrix (between 50 and 0.25 at.% Fe). Information is obtained on the
New mixed-ligands complexes with empirical formulae: M(2,4′-bpy)2L2·H2O (M(II)Zn, Cd), Zn(2-bpy)3L2·4H2O, Cd(2-bpy)2L2·3H2O, M(phen)L2·2H2O (where M(II)=Mn, Ni, Zn, Cd; 2,4′-bpy=2,4′-bipyridine, 2-bpy=2,2′-bipyridine, phen=1,10-phenanthroline, L=HCOO−) were prepared in pure solid state. They were characterized by chemical, thermal and X-ray powder diffraction analysis, IR spectroscopy, molar conductance in MeOH, DMF and DMSO. Examinations of OCO− absorption bands suggest versatile coordination behaviour of obtained complexes. The 2,4′-bpy acts as monodentate ligand; 2-bpy and phen as chelating ligands. Thermal studies were performed in static air atmosphere. When the temperature raised the dehydration processes started. The final decomposition products, namely MO (Ni, Zn, Cd) and Mn3O4, were identified by X-ray diffraction.
Preparation and thermal dehydration of manganese(II) dicarboxylate hydrates
作者:Yukihiko Suzuki
DOI:10.1016/0040-6031(94)02132-8
日期:1995.5
analysis and IR spectral measurement. The thermaldehydrations of the Mn(II) dicarboxylate hydrates were investigated by TG-DTA. The temperatures at which dehydration occurred were taken as a measure of the strength of the MnOH 2 bond, and these were found to vary with increasing number of CH 2 groups in the dicarboxylic acid. The kinetic parameters for the dehydration were calculated by employing a computation
摘要 通过将MnCO 3 粉末或浓MnSO 4 溶液加入到相应二羧酸的水溶液中,制备了二羧酸锰(II)水合物Mn[OOC(CH 2 ) n COO] · x H 2 O。通过光学显微镜观察沉淀化合物的晶型。获得的晶体为椭圆形、短棒状或非常小的不均匀颗粒。晶体不同于二羧酸的晶体。获得的二羧酸盐通过 X 射线衍射分析和红外光谱测量进行表征。通过TG-DTA研究了Mn(II)二羧酸盐水合物的热脱水。脱水发生的温度被视为衡量 MnOH 2 键强度的指标,并且发现这些随着二羧酸中CH 2 基团数量的增加而变化。脱水的动力学参数采用计算方法计算。发现三维扩散模型最适合描述主反应的动力学结果。
Redesign and manually control the commercial plasma green Zn2SiO4:Mn2+ phosphor with high quantum efficiency for white light emitting diodes
the luminescence properties of commercial plasmagreen Zn2SiO4:Mn2+ phosphors for using as white light emitting diodes phosphors due to the strong absorption intensity at 420 nm. When excited at 420 nm, the quantum efficiency of the best redesigned Zn2SiO4:Mn2+ greenphosphor can reach 76.2% which is much higher than 1.26% of the original Zn2SiO4:Mn2+ phosphor. To make clear the mechanism of the strong
Heterogeneously Porous γ-MnO<sub>2</sub>-Catalyzed Direct Oxidative Amination of Benzoxazole through CH Activation in the Presence of O<sub>2</sub>
作者:Provas Pal、Arnab Kanti Giri、Harshvardhan Singh、Subhash Chandra Ghosh、Asit Baran Panda
DOI:10.1002/asia.201402057
日期:2014.9
Oxidative amination of azoles through catalyticCHbond activation is a very important reaction due to the presence of 2‐aminoazoles in several biologically active compounds. However, most of the reported methods are performed under homogeneous reaction conditions using excess reagents and additives. Herein, we report the heterogeneous, porous γ‐MnO2‐catalyzed direct amination of benzoxazole with